Environment-friendly low-smoke halogen-free cable

Abstract

The utility model relates to the technical field of wires and cables, and particularly discloses an environment-friendly low-smoke halogen-free cable, which sequentially comprises conductors formed by twisting a plurality of strands of tinned copper wires, sub-conductor insulating layers extruded on the outer walls of the conductors, an outer insulating layer coated on the outer walls of the plurality of sub-conductor insulating layers, and an inner insulating layer coated on the outer walls of the plurality of sub-conductor insulating layers from inside to outside, the material is halogen-free cross-linked polyolefin, the tensile layer is composed of a fiber braid layer, the shielding layer comprises a double-layer structure formed by longitudinally wrapping an inner layer of aluminum foil and weaving an outer layer of tinned copper wires, a plurality of strands of tinned copper wire conductors improve conductivity and oxidation resistance, and a branch conductor insulating layer and an outer insulating layer form a double insulating barrier. The current leakage risk is blocked through the halogen-free cross-linked polyolefin material, the filling layer is made of inorganic ceramic silicone rubber, a ceramic protection layer is formed when meeting high temperature such as a fire disaster, oxygen is isolated, flame spreading is delayed, and the low-smoke halogen-free flame-retardant material of the sheath layer inhibits release of smoke and toxic gas during combustion.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable technology, and specifically discloses an environmentally friendly low-smoke halogen-free cable. Background Technology

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information, and realize the conversion of electromagnetic energy. In a broad sense, wires and cables are also simply referred to as cables. In a narrow sense, cables refer to insulated cables, which can be defined as: an assembly consisting of one or more insulated conductors, and their respective possible coverings, overall protective layers, and outer sheaths. Cables may also have additional uninsulated conductors.

[0003] Traditional cables often use halogen-containing polymer materials (such as PVC) for their insulation and sheath. When burned, these materials produce large amounts of toxic fumes and corrosive gases, threatening personnel safety and equipment integrity. While existing low-smoke halogen-free cables can reduce halogen release, they still have shortcomings in flame retardancy, mechanical strength, and long-term stability. For example, the single-layer sheath structure is easily damaged by external forces, and the addition of flame retardants may cause material embrittlement, affecting the cable's flexibility. Utility Model Content

[0004] This utility model proposes an environmentally friendly low-smoke halogen-free cable. Through the composite covering structure of the conductor insulation layer and the outer insulation layer, multiple flame-retardant barriers are formed, which significantly reduces the release of smoke and toxicity during combustion. In addition, the spiral concave-convex texture design on the surface of the sheath layer enhances the wear resistance, improves the mechanical strength and environmental adaptability of the cable, and has excellent safety performance.

[0005] This utility model is implemented as follows: an environmentally friendly, low-smoke, halogen-free cable, comprising, from the inside out:

[0006] The conductor is made of multiple strands of tin-plated copper wire twisted together.

[0007] The conductor insulation layer is extruded onto the outer wall of each conductor;

[0008] The outer insulation layer, which covers the outer wall of multiple conductor insulation layers, is made of halogen-free cross-linked polyolefin;

[0009] The tensile layer is composed of a fiber braided layer;

[0010] The shielding layer consists of a double-layer structure consisting of an inner layer of longitudinally wrapped aluminum foil and an outer layer of tin-plated copper wire braid.

[0011] The sheath layer is made of low-smoke, halogen-free, flame-retardant polyolefin material.

[0012] As a preferred embodiment of the environmentally friendly low-smoke halogen-free cable of this utility model, a filling layer is provided between the conductor insulation layer and the outer insulation layer, and the filling layer is inorganic ceramicized silicone rubber.

[0013] As a preferred embodiment of the environmentally friendly low-smoke halogen-free cable of this utility model, the outer surface of the sheath layer is provided with a continuously spirally distributed convex and concave pattern, the depth of the convex and concave pattern is 0.2-0.5mm, and the spacing is 2-5mm.

[0014] As a preferred embodiment of the present invention, an environmentally friendly low-smoke halogen-free cable is provided between the shielding layer and the sheath layer, wherein the water-blocking strip is a polyester fiber substrate coated with water-absorbing resin.

[0015] As a preferred embodiment of the present invention, the fiber braided layer of the tensile layer is either aramid fiber or glass fiber.

[0016] As a preferred embodiment of the environmentally friendly low-smoke halogen-free cable of this utility model, the thickness of the outer insulation layer is 0.8-1.2mm.

[0017] As a preferred embodiment of the environmentally friendly low-smoke halogen-free cable of this utility model, the sheath layer is filled with an anti-ultraviolet agent and has a thickness of 1.5-2.0mm.

[0018] The beneficial effects of this utility model are:

[0019] Multi-strand tinned copper wire conductors enhance conductivity and oxidation resistance. A double insulation barrier is formed by the conductor insulation layer and the outer insulation layer. Halogen-free cross-linked polyolefin material blocks the risk of current leakage. The filler layer uses inorganic ceramicized silicone rubber, which forms a ceramicized protective layer upon exposure to high temperatures, such as in a fire, isolating oxygen and slowing the spread of flames. The low-smoke, halogen-free flame-retardant material in the sheath layer suppresses the release of smoke and toxic gases during combustion. The aramid / glass fiber braided layer in the tensile layer increases tensile strength. The continuous spiral texture of the sheath layer increases surface friction resistance and reduces external wear. The water-blocking tape, with its absorbent resin coating, blocks moisture penetration and protects the internal structure. The shielding layer's inner aluminum foil longitudinal wrapping and outer tinned copper wire braided double-layer structure form a double electromagnetic shielding network, suppressing external interference signals, improving the cable's mechanical strength and environmental adaptability, and providing excellent safety performance. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a diagram showing the overall external structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is a cross-sectional structural diagram of the conductor of this utility model.

[0024] The markings in the diagram are: 1. Conductor; 2. Sub-conductor insulation layer; 3. Outer insulation layer; 4. Tensile layer; 5. Shielding layer; 6. Sheath layer; 7. Filler layer; 8. Water-blocking tape; 9. Textured surface. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Please see Figure 1-3 An environmentally friendly, low-smoke, halogen-free cable, comprising, from the inside out:

[0027] Conductor 1 is made of multiple strands of tin-plated copper wire twisted together;

[0028] The conductor insulation layer 2 is extruded onto the outer wall of each conductor 1;

[0029] The outer insulation layer 3 covers the outer wall of the multiple sub-conductor insulation layers 2, and the material is halogen-free cross-linked polyolefin;

[0030] Tensile layer 4 is composed of a fiber braided layer;

[0031] The shielding layer 5 consists of a double-layer structure consisting of an inner layer of longitudinally wrapped aluminum foil and an outer layer of tin-plated copper wire braiding.

[0032] Sheath layer 6 is made of low-smoke, halogen-free, flame-retardant polyolefin material.

[0033] In this embodiment: the multi-strand tin-plated copper wire conductor 1 improves conductivity and oxidation resistance; the conductor insulation layer 2 and the outer insulation layer 3 form a double insulation barrier; the risk of current leakage is blocked by halogen-free cross-linked polyolefin material; the filler layer 7 uses inorganic ceramicized silicone rubber, which forms a ceramicized protective layer when exposed to high temperatures such as fire, isolating oxygen and delaying the spread of flames; the low-smoke halogen-free flame-retardant material of the sheath layer 6 inhibits the release of smoke and toxic gases during combustion; the aramid / glass fiber braided layer of the tensile layer 4 improves tensile strength; the continuous spiral texture 9 of the sheath layer 6 increases surface friction resistance and reduces external wear; the water-blocking tape 8 blocks moisture penetration through a water-absorbing resin coating, protecting the internal structure; the shielding layer 5 has a double-layer structure of inner aluminum foil longitudinal wrapping and outer tin-plated copper wire braiding, forming a double electromagnetic shielding mesh to suppress external interference signals.

[0034] As a technical optimization of this utility model, a filling layer 7 is provided in the gap between the conductor insulation layer 2 and the outer insulation layer 3, and the filling layer 7 is inorganic ceramicized silicone rubber.

[0035] In this embodiment: the filler layer 7 is made of inorganic ceramicized silicone rubber, which forms a ceramicized protective layer when exposed to high temperatures such as fire, isolating oxygen and delaying the spread of flames.

[0036] As a technical optimization of this utility model, the outer surface of the sheath layer 6 is provided with a continuously spirally distributed concave-convex texture 9, the depth of the concave-convex texture 9 is 0.2-0.5mm, and the spacing is 2-5mm.

[0037] In this embodiment:

[0038] As a technical optimization of this utility model, a water-blocking strip 8 is provided between the shielding layer 5 and the sheath layer 6. The water-blocking strip 8 is a polyester fiber substrate with a surface coated with water-absorbing resin.

[0039] In this embodiment: the water-blocking strip 8 blocks moisture penetration through the water-absorbing resin coating, protecting the internal structure.

[0040] As a technical optimization of this utility model, the fiber braided layer of the tensile layer 4 is either aramid fiber or glass fiber.

[0041] In this embodiment, the aramid / glass fiber woven layer of tensile layer 4 enhances tensile strength.

[0042] As a technical optimization of this utility model, the thickness of the outer insulation layer 3 is 0.8-1.2mm.

[0043] In this embodiment, the conductor insulation layer 2 and the outer insulation layer 3 form a double insulation barrier, blocking the risk of current leakage through halogen-free cross-linked polyolefin material.

[0044] As a technical optimization of this utility model, the sheath layer 6 is filled with an anti-ultraviolet agent and has a thickness of 1.5-2.0mm.

[0045] In this embodiment, the inner part of the sheath layer 6 is filled with an anti-ultraviolet agent and has a thickness of 1.5-2.0mm, which improves the anti-ultraviolet ability of the sheath layer 6 and enhances the overall protection effect of the cable.

[0046] The working principle and usage process of this utility model are as follows: The multi-strand tin-plated copper wire conductor 1 improves conductivity and oxidation resistance. The conductor insulation layer 2 and the outer insulation layer 3 form a double insulation barrier. The risk of current leakage is blocked by halogen-free cross-linked polyolefin material. The filler layer 7 uses inorganic ceramicized silicone rubber, which forms a ceramicized protective layer when exposed to high temperatures such as fire, isolating oxygen and delaying the spread of flames. The low-smoke halogen-free flame-retardant material of the sheath layer 6 inhibits the release of smoke and toxic gases during combustion. The aramid / glass fiber braided layer of the tensile layer 4 improves tensile strength. The continuous spiral texture 9 of the sheath layer 6 increases surface friction resistance and reduces external wear. The water-blocking tape 8 blocks water penetration through a water-absorbing resin coating and protects the internal structure. The shielding layer 5 has a double-layer structure of inner aluminum foil longitudinal wrapping and outer tin-plated copper wire braiding, forming a double electromagnetic shielding mesh to suppress external interference signals.

[0047] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An environmentally friendly low smoke and zero halogen cable, characterized in that: From inside to outside in turn includes: Conductor (1), by a plurality of tinned copper wire stranded; Sub-conductor insulation layer (2), the sub-conductor insulation layer (2) is extruded on the outer wall of each conductor (1); Outer insulation layer (3), coated on the outer wall of a plurality of sub-conductor insulation layer (2), the material is halogen-free crosslinked polyolefin; Tensile layer (4) is composed of fiber woven layer; Shielding layer (5) includes inner layer aluminum foil longitudinal package and outer layer tinned copper wire woven double-layer structure; Sheath layer (6) is made of low smoke halogen-free flame retardant polyolefin material.

2. The environmentally friendly low-smoke halogen-free cable according to claim 1, characterized in that: The gap between the sub-conductor insulation layer (2) and the outer insulation layer (3) is provided with a filling layer (7), and the filling layer (7) is inorganic ceramic silicone rubber.

3. The environmentally friendly low smoke and zero halogen cable according to claim 1, characterized in that: The outer surface of the sheath layer (6) is provided with continuous spiral distribution of concave-convex lines (9), the depth of the concave-convex lines (9) is 0.2-0.5mm, and the interval is 2-5mm.

4. The environmentally friendly low smoke and zero halogen cable of claim 1, wherein: The shielding layer (5) and the sheath layer (6) are provided with a water blocking belt (8), and the water blocking belt (8) is a polyester fiber base material coated with water absorbing resin on the surface.

5. The environmentally friendly low smoke and zero halogen cable of claim 1, wherein: The fiber woven layer of the tensile layer (4) is one of aramid fiber or glass fiber.

6. The environmentally friendly low smoke and zero halogen cable of claim 1, wherein: The thickness of the outer insulation layer (3) is 0.8-1.2mm.

7. The environmentally friendly low smoke and zero halogen cable of claim 1, wherein: The inside of the sheath layer (6) is filled with ultraviolet resistant agent and the thickness is 1.5-2.0mm.

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